include/ns16550.h

   1 /*
   2  * NS16550 Serial Port
   3  * originally from linux source (arch/ppc/boot/ns16550.h)
   4  * modified slightly to
   5  * have addresses as offsets from CFG_ISA_BASE
   6  * added a few more definitions
   7  * added prototypes for ns16550.c
   8  * reduced no of com ports to 2
   9  * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
  10  */
  11
  12 #if (CFG_NS16550_REG_SIZE == 1)
  13 struct NS16550 {
  14         unsigned char rbr;              /* 0 */
  15         unsigned char ier;              /* 1 */
  16         unsigned char fcr;              /* 2 */
  17         unsigned char lcr;              /* 3 */
  18         unsigned char mcr;              /* 4 */
  19         unsigned char lsr;              /* 5 */
  20         unsigned char msr;              /* 6 */
  21         unsigned char scr;              /* 7 */
  22 #if defined(CONFIG_OMAP730)
  23         unsigned char mdr1;             /* 8 */
  24         unsigned char reg9;             /* 9 */
  25         unsigned char regA;             /* A */
  26         unsigned char regB;             /* B */
  27         unsigned char regC;             /* C */
  28         unsigned char regD;             /* D */
  29         unsigned char regE;             /* E */
  30         unsigned char regF;             /* F */
  31         unsigned char reg10;            /* 10 */
  32         unsigned char ssr;              /* 11*/
  33 #endif
  34 } __attribute__ ((packed));
  35 #elif (CFG_NS16550_REG_SIZE == 2)
  36 struct NS16550 {
  37         unsigned short rbr;             /* 0 */
  38         unsigned short ier;             /* 1 */
  39         unsigned short fcr;             /* 2 */
  40         unsigned short lcr;             /* 3 */
  41         unsigned short mcr;             /* 4 */
  42         unsigned short lsr;             /* 5 */
  43         unsigned short msr;             /* 6 */
  44         unsigned short scr;             /* 7 */
  45 } __attribute__ ((packed));
  46 #elif (CFG_NS16550_REG_SIZE == 4)
  47 struct NS16550 {
  48         unsigned long rbr;              /* 0 r  */
  49         unsigned long ier;              /* 1 rw */
  50         unsigned long fcr;              /* 2 w  */
  51         unsigned long lcr;              /* 3 rw */
  52         unsigned long mcr;              /* 4 rw */
  53         unsigned long lsr;              /* 5 r  */
  54         unsigned long msr;              /* 6 r  */
  55         unsigned long scr;              /* 7 rw */
  56 }; /* No need to pack an already aligned struct */
  57 #elif (CFG_NS16550_REG_SIZE == -4)
  58 struct NS16550 {
  59         unsigned char rbr;              /* 0 */
  60         int pad1:24;
  61         unsigned char ier;              /* 1 */
  62         int pad2:24;
  63         unsigned char fcr;              /* 2 */
  64         int pad3:24;
  65         unsigned char lcr;              /* 3 */
  66         int pad4:24;
  67         unsigned char mcr;              /* 4 */
  68         int pad5:24;
  69         unsigned char lsr;              /* 5 */
  70         int pad6:24;
  71         unsigned char msr;              /* 6 */
  72         int pad7:24;
  73         unsigned char scr;              /* 7 */
  74         int pad8:24;
  75 #if defined(CONFIG_OMAP)
  76         unsigned char mdr1;             /* mode select reset TL16C750*/
  77 #endif
  78 #ifdef CONFIG_OMAP1510
  79         int pad9:24;
  80         unsigned long pad[10];
  81         unsigned char osc_12m_sel;
  82         int pad10:24;
  83 #endif
  84 } __attribute__ ((packed));
  85 #else
  86 #error "Please define NS16550 registers size."
  87 #endif
  88
  89 #define thr rbr
  90 #define iir fcr
  91 #define dll rbr
  92 #define dlm ier
  93
  94 typedef volatile struct NS16550 *NS16550_t;
  95
  96 #define FCR_FIFO_EN     0x01            /* Fifo enable */
  97 #define FCR_RXSR        0x02            /* Receiver soft reset */
  98 #define FCR_TXSR        0x04            /* Transmitter soft reset */
  99
 100 #define MCR_DTR         0x01
 101 #define MCR_RTS         0x02
 102 #define MCR_DMA_EN      0x04
 103 #define MCR_TX_DFR      0x08
 104
 105 #define LCR_WLS_MSK     0x03            /* character length select mask */
 106 #define LCR_WLS_5       0x00            /* 5 bit character length */
 107 #define LCR_WLS_6       0x01            /* 6 bit character length */
 108 #define LCR_WLS_7       0x02            /* 7 bit character length */
 109 #define LCR_WLS_8       0x03            /* 8 bit character length */
 110 #define LCR_STB         0x04            /* Number of stop Bits, off = 1, on = 1.5 or 2) */
 111 #define LCR_PEN         0x08            /* Parity eneble */
 112 #define LCR_EPS         0x10            /* Even Parity Select */
 113 #define LCR_STKP        0x20            /* Stick Parity */
 114 #define LCR_SBRK        0x40            /* Set Break */
 115 #define LCR_BKSE        0x80            /* Bank select enable */
 116
 117 #define LSR_DR          0x01            /* Data ready */
 118 #define LSR_OE          0x02            /* Overrun */
 119 #define LSR_PE          0x04            /* Parity error */
 120 #define LSR_FE          0x08            /* Framing error */
 121 #define LSR_BI          0x10            /* Break */
 122 #define LSR_THRE        0x20            /* Xmit holding register empty */
 123 #define LSR_TEMT        0x40            /* Xmitter empty */
 124 #define LSR_ERR         0x80            /* Error */
 125
 126 #ifdef CONFIG_OMAP1510
 127 #define OSC_12M_SEL     0x01            /* selects 6.5 * current clk div */
 128 #endif
 129
 130 /* useful defaults for LCR */
 131 #define LCR_8N1         0x03
 132
 133 void    NS16550_init   (NS16550_t com_port, int baud_divisor);
 134 void    NS16550_putc   (NS16550_t com_port, char c);
 135 char    NS16550_getc   (NS16550_t com_port);
 136 int     NS16550_tstc   (NS16550_t com_port);
 137 void    NS16550_reinit (NS16550_t com_port, int baud_divisor);